Blue-flame oil-stove.



A. J. BLAGKPORD.

BLUE FLAME OIL STOVE.

APPLIOATION FILED NOV. 12, 1912.

1,074,686. Patented Oct. 7, 1913.

3 SHEETS-SHEETL I I I v i I I i I I i Y I I m M 104mm E 7 Man/1M) -A. J. BLAGKPORD.

BLUE FLAME OIL STOVE.

' v APPLICATION FILED NOV. 12, 1912. 1,074,686. Patented 0013.7,1913.

3 SHEETS-SHEET 2.

A. J. BLACKFORD.

BLUE FLAME OIL STOVE. APPMOATION FILED NOV. 12, 1912.

Patented Oct. 7, 1913.

3 SHEETS-SHEET 34 pooooo wi/imwoeo To all whom it may concern:

- UNITED STATES PATENT OFFICE.

ATWELL J. ELAcxroEn, or CLEVELAND, OHIO, AssINoE r0 AMERICAN s'rovE COMPA Y, or ST. LOUIS, mssoum, A coEPoR 'rIoN on NEW JERSEY.

BLUE-FLAME OIL-STOVE.

Specification 0t Letterslat ent.

Application filed November 12, 1912. Serial No. 730,98 5.

Be it known that- I, ATWELL J. BLAoK- FORD, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Blue Flame Oil-Stoves, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to improvements in blue flame oil stoves, and is an improvement on a type of burner in which there is a vapor generating flame which generates an excess' of vapor that afterward has air mixed therewith in proper quantities and then passed through a blue flame burner cap, which produces a blue-flame of large extent and maximum heating-eificiency. l

My presentimprovement generically con- Sidered pertains to providing a yellow initial heating flame adapted to be converted into a vapor generating blue flame, which generates an excess of vapor, the excess of vapor having air mixed with it and passed through a suitable blue flame burner-cap for producing the final flame for cooking puroses. v A further object of my present invention is to provide means for drawing vapor from at, or approximately at the blue flame vapor generating flame to supply vapor for the final workingblue flame.

I am aware that Edward Boeckenkamp, of St. Louis, Missouri, has devised a burner in which there is a blue flame initial heating and a blue flame vapor generating flame for generating excess vapor to be supplied with air and finally burned at a blue flame burnercap, but my improvement is broadly the means for providing an initial heating yellow flame adapted to be converted into a vapor generating blue flame, and to provide the excess vapor in a different mannerfrom that in the aforesaid Boeckenkamp burner. I find that the parts of the burner can be more efliciently and more quickly heated up by the yellow flame than by the initial heating blue flame, and I alsd find that there are certain other advantages in my improved manner of obtaining the excess vapor for the final working flame.

view of the burner, the chimney'having been shown in side elevation. Fig. 3 is a sec-- tional view of the chimney and the inner tube. Fig. 4 is an enlarged invertedplan view of the slotted blue flame burner cap. Fig. 5 is a sectional view of a modification in the form of a chimney. Fig. 6 is an inverted plan view of the cap or deflector for the initial heating and vapor generating burner, 7 showing the converter and draft tube in position.

Referring now to the drawings, 1 is a base within which is located the wick-tube 2, containing a vertically adjustable wick 3. This wick is vertically adjust-able by means of a thumb-screw 4, and any form of intervening mechanism (not shown) for raising and lowerihg the wick. A burner-cap or deflector 5 rests upon and is adjusted up and down with the wick, this cap being movable on a rod 6 carrying a stop 7 at itsupper end.

The cap or deflector 5 comprises a sleeve portion 8, projecting down within the wicktube, which has'a series of arms 9 projecting radially'from the said flanges and resting on the wick 3. An annular flange 10' projects outward above the arms 9, and this flange is provided around its edge with the openings 11.

A perforated vertically arranged annular gallery 12 surrounds the burner-cap 5, and a removable chimney 13 has its outer end fitting around and surrounding a flange 14, which flange is spaced from the gallery 12. The l i flange 14, chimney 13 and gallery 12 are removable together, all being supported in position by the lower end of the gallery 12, resting in an annular cup-shaped flange 15, extending out from the upper end of the wick-tube 2. As shown in Figs. 1 to 3 in elusive, the chimney 13 is tapered or contracted upwardly. Located within this chimney is a straight wall tube 16 to which is attached a rod or handle 17 passed outwardly through a bayonet joint-shapedslot 18, by means of which the tube16 may be raised and locked in this raised position, as shown in Fig. 3, and, then lowered, a

- about one-fourth the distance of its length ently from its lower end. The upper end 22 of the tube is opened tive osition around the cap 5, there is an ann r space 24 between its lower end and the-burner-cap 5 for apurpose to be presdescribed. 3 T e object of having'the tapered chimney and-the strai ht wall tube 16 is to enable the tube and ot er arts to be more readily heated in the initial heating and to be more readily kept hot in the normal operation of the burner, and thereby more efliciently prevent any condensation of the 'vapor on the walls of either the chimney or the tube.- In Fig. 5 I show a modification of the chimney in providing the upper portion with a straight wall 13', and its lower end enlarged outward, as shown at14'. In all other respects the burner is like that shown in Fi s. 1, 2, 3 and 6, and the operation substantially the same.

In operation the wick is turned up carrying with it the burner-cap 5, to expose the wick The chimney is then removed, taking with it the gallery 12, flange 14 and tube 16.

- The wick is then lighted, the parts placed in osition with the tube 16 elevated, as shown in Fig. 3. There is then produced a yellow flame of considerable extent. This yellow flame heats the tube 16, the chimney 13, the burner-cap 23 and in general the surrounding parts of the burner. When the arts have become thoroughly heated, the tu 16 is lowered to the position shown in dotted lines, Fig. 2, which converts the yellow flame into a blue flame. This conversion of the yellow flame naturally reduces the size of the flame and at the same time this tube when in this lowered osition causes a decided draft right at t e wick or burning point, and this draft sucks the vapor from behind the wick between the arms 9, and through the openings 11, in the flange 10,

and also draws some of the vapor from the flame. This draft which" thus draws the vapor; robs the flame, and, of course, reduces the flame so that there is a small blue flame as compared to the original yellow flame and an excess amount of vapor which is drawn upward into the tube 16. This vapor has already'mixed with it a considerable amount of aircaused by the draft drawing the air'with the vapor through the passages formed by the arms 9 and openings 11 and into the upper end of the" chimne "'13 and immediately-"belowthe slotted lue flame burner-cap 23.1 When the tube 16 is lowered into opera-.

19, practically suflicient to cause it to burn with the blue flame at the burner-cap 23. Thevapor is also drawn through the annular space 24 between the lower end'of the tube 16 and the burner-cap. For the purpose of accelerating the draft through the tube "and toadd a little more air to the vapor, I rovide a plurality of openin 2. in-the -tu. 16, wh1ch I find material y accelerates the draft therein for drawing the vapor from the vaporizing point of the wick an flame-and-materially improves the final flame burning at the working burner 23 at the top of the chimney.

Having thu described my invention, what I claim and desire to secure by Letters Patentis:--

1. A burner of the type described, comrising a chimney having 'a blue flame urner-cap at its top, an initial heating dyellow flame burner within the lower on of the chimney, a movable tube within the chimney adapted to surround the burner and convert the. yellow flame into a blue-flame, said tube having air pa es therethrou h for creating a draft and mixing air with t e excess vapor and drawing it throu h the blue-flame burner and forcing it t rou h the aforesaid blue flame burner-cap at t e top of the chimney.

2. A burner of the type disclosed having a chimney with a blue ame burner-caflp at its top, an initial heating yellow ame burner within the lower end of the chimney,

chimney, a vertically movable tube within the chimney and adapted to have its lower end surround the burner to convert the yellow flame into a blue flame, said tube having air passages at its lower end and passages intermediate itsends.

4. .A burner 'of the type disclosed, comprising a chimney havin a blue flame burner-cap at its top, an initial heating yellow flame burner within the lower end of the chimney and an elongated open ended vertically movable tube within the chimney and adapted to have its lower end surround the burner to convert the yellow flame into a blue flame, said chimney creating a draft to draw the excess vapor through the tube and delivering it to the burner-cap at the upper end of the chimney.

5. A burner of the type disclosed, comthe chinmey, a vertically movable tube In testimony whereof I hereunto afiix my within the chimney at its lower end and signature in the presence of two Witnesses.

adapted to surround the burner, the burner havlng air passages located in a vertical ATWELL J (BLACKFORD. 5 plane within the lower end of the tube through which air and excess vapor are Witnesses:

drawn and conveyed to the burner-cap at E. l -SCHNEIDER,

the top of the chimney. V F; T. BATGHELOR. 

